Change the new-task-manager flag so that the new implementation is enabled by default for all users.

chrome/browser/task_manager/task_manager_browsertest_util.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/task_manager/task_manager_browsertest_util.h"
 
+#include "base/command_line.h"
 #include "base/location.h"
 #include "base/run_loop.h"
 #include "base/single_thread_task_runner.h"
 #include "base/strings/pattern.h"
 #include "base/strings/string16.h"
 #include "base/strings/string_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/test/test_timeouts.h"
 #include "base/thread_task_runner_handle.h"
 #include "base/timer/timer.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/task_manager/resource_provider.h"
 #include "chrome/browser/task_manager/task_manager.h"
+#include "chrome/common/chrome_switches.h"
 #include "chrome/grit/generated_resources.h"
 #include "extensions/strings/grit/extensions_strings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 #include "ui/base/l10n/l10n_util.h"
 
 namespace task_manager {
 namespace browsertest_util {
 
 namespace {
 
@@ skipping 139 matching lines @@
   const int required_count_;
   const base::string16 title_pattern_;
   const ColumnSpecifier column_specifier_;
   const size_t min_column_value_;
   base::RunLoop run_loop_;
   base::OneShotTimer<ResourceChangeObserver> timer_;
 };
 
 }  // namespace
 
+void EnableOldTaskManager() {
+  base::CommandLine::ForCurrentProcess()->AppendSwitch(
+      switches::kDisableNewTaskManager);
+}
+
 void WaitForTaskManagerRows(int required_count,
                             const base::string16& title_pattern) {
   TaskManagerModel* model = TaskManager::GetInstance()->model();
 
   const int column_value_dont_care = 0;
   ResourceChangeObserver observer(model, required_count, title_pattern,
                                   COLUMN_NONE, column_value_dont_care);
   model->AddObserver(&observer);
   observer.RunUntilSatisfied();
   model->RemoveObserver(&observer);
@@ skipping 69 matching lines @@
 base::string16 MatchUtility(const base::string16& title) {
   return l10n_util::GetStringFUTF16(IDS_TASK_MANAGER_UTILITY_PREFIX, title);
 }
 
 base::string16 MatchAnyUtility() {
   return MatchUtility(base::ASCIIToUTF16("*"));
 }
 
 }  // namespace browsertest_util
 }  // namespace task_manager